a fine, very hard, gray crystalline powder, a compound of tungsten and carbon. This compound is bonded with cobalt or nickel in cemented carbide compositions and used for cutting tools, abrasives, and dies.
WC It appears a fine gray powder used for rough grinding and as an abrasive in tool and dies, and wear resistant tool and machine parts.
An extremely dense metal (tungsten) that is alloyed with a nickel-binder carbide to create a substance second only to diamonds in hardness. Tungsten carbide is 10 times harder than 18k gold, 4 times harder than titanium and about twice as hard as steel. The Jewelry Store's tungsten-carbide rings contain no cobalt, so they are completely hypoallergenic. Tungsten carbide measures 9 on the Mohs hardness scale.